If she liked the constitution, maybe the shooter was inspired by the left-wing congresspeople complaining about the reading.
They will find two issues that your District really cares about (typically 2nd Amendment and national defense) and vote conservative on those issues. Then on other issues which are damaging to America ("Dream Act", Obamacare, abortion, unemployment extension, etc.) they will vote in a block with the rest of the Democrat party.
This is how the Democrat Party have suckered American voters for years and one big reason they have maintained majorities when they should not have.
Unfortunately too many voters focus on their one hot-button issue and dont look any farther. Perhaps some good will come out of this incident if more people learn the truth about "blue dogs".